The reaction 2 A ( g )+ B ( g ) ⇌ 3 C ( g )+ D ( g ) is begun with the concentrations of A and B both at an initial value of 1.00 M. When equilibrium…

The reaction $$2 \mathrm{~A}(\mathrm{~g})+\mathrm{B}(\mathrm{~g}) \rightleftharpoons 3 \mathrm{C}(\mathrm{~g})+\mathrm{D}(\mathrm{~g}) $$ is begun with the concentrations of A and B both at an initial value of $\displaystyle 1.00$ M. When equilibrium is reached, the concentration of D is measured and found to be $\displaystyle 0.25$ M. The value for the equilibrium constant for this reaction is given by the expression